baber/WOPTO huggingface dataset:
Patent CZ-160698-A3 (CZ)
Title: Novel derivatives of indole-2,3-dione-3-oxime
Inventor: WAETJEN FRANK
IPC: A61K31/00
Filed: 1997-10-01
Abstract: The present invention relates to novel indole-2,3-dione-3-oxime derivatives capable of antagonising the effect of excitatory amino acids, such as glutamate. More specifically the novel indole-2,3-dione-3-oxime derivatives of the invention may be described by general formula (I), wherein R3 represents "Het", or a group of formula (II), wherein "Het" represents a saturated or unsaturated, 4 to 7 membered, monocyclic, heterocyclic ring, at least one of R31, R32, and R33 independendy represents hydrogen, alkyl, or hydroxyalkyl, and at least one of R31, R32, and R33 independently represents (CH2)nR34; wherein R34 represents hydroxy, carboxy, alkoxycarbonyl, alkenyloxycarbonyl, alkynyloxycarbonyl, cycloalkoxycarbonyl, cycloalkylalkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, CONR35R36, or "Het"; wherein n is 0, 1, 2, or 3; and R5 represents phenyl, naphthyl, thienyl, or pyridyl, all of which may be substituted. "A" represents a ring of five to seven atoms fused with the benzo ring at the positions marked "a" and "b", and formed by the following bivalent radicals: a-NR6-CH2-CH2-b; a-CH2-NR6-CH2-b; a-CH2-CH2-NR6-b; a-NR6-CH2-CH2-H2-b; a-CH2-NR6-CH2-CH2-b; a-CH2-CH2-NR6-CH2-b; a-CH2-CH2-CH2-NR6-b; a-NR6-CH2-CH2-CH2-CH2-b; a-CH2-NR6-CH2-CH2-CH2-b; a-CH2-CH2-NR6-CH2-CH2-b; a-CH2&mdas
Patent CZ-176898-A3 (CZ)
Title: Novel compounds exhibiting analgesic activity
Inventor: ROBERTS EDWARD
IPC: C07D405/14
Filed: 1996-12-11
Abstract: Piperidine and piperazine compounds of formula (I), their salts, isomers, hydrates, isoforms and prodrugs, are new. G = C (sic) or N; A = phenyl (substituted by COOH, CONH2, COOCH3, CN, NH2 or COCH3), naphthyl, benzofuranyl, quinolyl, or e.g. a group of formula (i) or (iv), (the phenyl ring of each being optionally substituted by 1 or 2 CF3, (CH2)oCF3, halo, CONR7R8, CO2R7, COR7, (CH2)oNR7R8, (CH2)oCH3(CH2)oSOR7, (CH2)oSO2R7 or (CH2)oSO2NR7R8; o = 0-2; R1, R7-R10, R15, R16 = H, 1-6C alkyl, 1-6C alkenyl, -CO(1-6C alkyl), (1-6C alkyl)-B, 3-8C cycloalkyl, 1-2C alkyl-3-6C cycloalkyl, 6-10C aryl or heteroaryl having 5-10 atoms selected from C, S, N and O, the aryl and heteroaryl being optionally substituted by 1 or 2 CH3, (CH2)oCF3, halo, CONR7R8, CO2R7, COR7, (CH2)oNR7R8, (CH2)oCH3(CH2)oSOR7, (CH2)oSO2R7 and (CH2)oSO2NR7R8; R2 = H, CH3, OR1, CO2R 1 or CH2CO2R1; B = optionally substituted aromatic, optionally substituted 5-10C hydroaromatic, heteroaromatic or heterohydroaromatic each having 5-10 atoms selected from C, S, N and O, and each optionally substituted by 1 or 2 CH3, CF3, halo, (CH2)pCONR7R8, (CH2)pNR7R8, (CH2)pCOR7, (CH2)pCO2R7, OR7, (CH2)pSOR7, (CH2)pSO2R7 and (CH2)pSO2NR7R8; p = 0-3; R3-R6 = R7, (CH2)p'CONR7R8, (CH2)p'NR7R8, (CH2)p'CO2R7, (CH2)p'Ph, (CH2)p'(p-OH Ph), (CH2)p'-3-indolyl, (CH2)p'SR7 or (CH2)p'OR7; p' = 0-4; with proviso.
Patent CZ-239195-A3 (CZ)
Title: Compositions suitable for polymerization of olefins, process of their preparation and their use
Inventor: PETTIJOHN TED M
IPC: C08F10/00
Filed: 1995-09-15
Abstract: A composition, which can be used as catalyst for producing an olefin polymer having a multimodal molecular weight distribution, is provided that comprises a transition metal-containing catalyst, a metallocene, and a boron-containing organoaluminoxane, wherein each component of the composition is present in an effective amount so that an olefin polymer having a multimodal molecular weight distribution can be produced using the composition as catalyst, preferably in the presence of a cocatalyst. Also provided is a process for preparing the composition which comprises: (1) contacting a transition metal-containing catalyst with an organoaluminoxane dispersed in a solvent to form a slurry; (2) combining the slurry with a boroxine to prepare a combination of a transition metal-containing catalyst and boron-containing organoaluminoxane; and (3) contacting the combination with a metallocene. Further provided is a process for polymerizing an olefin to prepare an olefin polymer using the composition.
Patent CZ-254693-A3 (CZ)
Title: Pyrotechnic charge
Inventor: BOBERG TORE
IPC: C06C5/06
Filed: 1993-11-26
Abstract: A pyrotechnic delay charge for providing delays in the millisecond and second ranges, comprising the components bismuth oxide as an oxidation agent and silicon as a fuel. The invention also relates to a pyrotechnic delay element having an enclosure containing the pyrotechnical delay charge, and to a detonator having a housing, ignition means disposed at one end of the housing, a base charge of a secondary explosive disposed at the other end of the housing and the pyrotechnic delay charge disposed therebetween.
Patent CZ-299398-A3 (CZ)
Title: Acid polylactic polymers
Inventor: LOUGHMAN THOMAS CIARAN
IPC: C08L101/16
Filed: 1997-04-22
Abstract: Methods of preparing biodegradable polyesters containing lactic acid units and/or glycolic acid units and optionally other hydroxy acids are provided, as well as biodegradable polyesters comprising lactic acid units and glycolic acid units and an initiator.
Patent CZ-337395-A3 (CZ)
Title: Transportation and storage of acetylene and vessel for making the same
Inventor: BRANDSCH-BOHM LUTZ
IPC: F17C11/00
Filed: 1995-12-19
Abstract: Transport and storage system in which the acetylene is held in solution in a solution medium within a container (1). The solution is separated from the gas phase which is also present by a cover. The separation may be achieved by the use of a fluid (3) of a lower specific density that of the solution. The fluid is composed of one of the components of the group iso-pentane, n-hexane and n-heptane.
Patent CZ-344999-A3 (CZ)
Inventor: DEVEREUX WILLIAM
IPC: B26F1/24
Filed: 1998-04-09
Abstract: Netkaná látka schopná zúžení se zavede do štěrbiny (14) mezi
dva válce (15,16). Zde se vystaví přírůstkovému roztahování
ve směru rovnoběžnéms prvnímsměrem. Dále se na netkanou
látku působí napínací silou ato mezi sestavou (26) a sestavou
mechanické stabilizace (38), která způsobíjejí zúžení. Zúžená
netkaná látka se mechanicky stabilizuje v sestavě mechanické
stabilizace (38), čímž vznikne stabilizovaná, roztažitelná,
zúžená netkaná látka. Tato látka se dá snadno roztáhnout, a to
ve směru rovnoběžnémse směremzužování.
Patent CZ-347199-A3 (CZ)
Title: Formulation of erythromycin derivatives with prolonged release
Inventor: AL-RAZZAK LAMAN A
IPC: A61K31/7048
Filed: 1998-03-06
Abstract: Disclosed is a pharmaceutical composition for extended release of an erythromycin derivative in the gastrointestinal environment. The composition comprises an erythromycin derivative and a pharmaceutically acceptable polymer so that, when ingested orally, the composition induces statistically significantly lower Cmax in the plasma than an immediate release composition of the erythromycin derivative while maintaining bioavailability and minimum concentration substantially equivalent to that of the immediate release composition of the erythromycin derivative upon multiple dosing. The compositions of the invention have an improved taste profile and reduced gastrointestinal side effects as compared to those for the immediate release composition. <IMAGE>
Patent CZ-366098-A3 (CZ)
Title: Bicyclic amines used as insecticides
Inventor: SALMON ROGER
IPC: A01N43/90
Filed: 1997-05-09
Abstract: The invention provides novel compounds of formula (I) and formula (II)    <IMAGE>  (I)   <IMAGE>  (II)  wherein R1 represents a group of formula (A)  presents either a group CR or the nitrogen atom, provided that not more than two of W, X, Y and Z represent the nitrogen atom and where each R present is independently selected from hydrogen and halogen atoms and cyano, amino, hydrazino, acylamino, hydroxy, alkyl, hydroxyalkyl, alkoxy, haloalkyl, haloalkoxy, alkenyl, alkenyloxy, alkoxyalkenyl, alkynyl, carboxylic acyl, alkoxycarbonyl, aryl and heterocyclyl groups, said groups comprising up to 6 carbon atoms, and wherein R2 represents a group XR3 where X represents oxygen or a group NR4 where R3 and R4 are individually selected from hydrogen or a group selected from alkyl, aryl, heteroaryl, aralkyl, heteroarylalkyl, alkenyl, aralkenyl, alkynyl, heterocyclylalkyl, alkoxycarbonyl, and carboxylic acyl groups, said groups comprising from 1 to 15 carbon atoms, said groups being optionally substituted with one or more substituents selected from, halogen, cyano, carboxyl, carboxylic acyl, carbamyl, alkoxycarbonyl, alkoxy, alkylenedioxy, hydroxy, nitro, haloalkyl and alkyl groups; and acid addition salts and quaternary ammonium salts and N-oxides derived therefrom. The compounds have useful insecticidal properties.
Patent CZ-367796-A3 (CZ)
Title: Briquettes as additive for metallurgical processes concerning residues containing silicon and process for producing thereof
Inventor: LUTZ STEPHAN
IPC: C22B1/244
Filed: 1996-12-13
Abstract: Briquettes are made containing in wt.%, 1-10 carton material 5-40 hydraulic cement; 0-20 metal and/or alloy and balance Si-containing waste material.
Patent ES-158800-A3 (ES)
Title: UN APARATO PARA LA PROYECCIoN, POR REFLEXIoN, DE DIBUJOS Y DISPOSITIVOS ESTABLECIDOS SOBRE CINTAS O BANDAS
Filed: 1942-09-14
Abstract: Aparato para la proyección por reflexión de dibujos fotografías y dispositivos caracterizado por el hecho de que los referidos dibujos fotografías o dispositivos van establecidos sobre una cinta o banda formando una bobina y cuenta aquel con medios por los que se consigna el desplazamiento de la propia cinta por al ventanilla de proyección obteniendo así una movilidad en los dibujos o fotografías proyectados.
Patent ES-383650-A3 (ES)
Title: Phase difference detectors
IPC: H03K5/26
Filed: 1970-09-15
Abstract: A phase difference detector for detecting when the phase difference between two waves, e.g. from sources 1, 2 exceed a predetermined amount comprises a delay element 21, a J-K flip-flop or other bi-stable circuit 4, to whose data inputs 3, 6 are applied a delayed wave, e.g. from source 1 and a wave inverted after delay while to the sampling input is applied the other of the two waves from source 2. A second J-K flip-flop 9 may be provided to whose data inputs 8, 11 are applied a delayed wave from source 2 and a delayed wave which is inverted at 10, and to the sampling input 13 is applied a wave from source 1. An output of " 1 " appears at 14 or 15 when the phases of waves from 1 or 2 leads the other by more than the delay of elements 2 or 7 and the bi-stable sampling time. Fig. 2 (not shown) indicates an inter-connected arrangement of NAND gates forming a setreset bi-stable circuit usable instead of J-K flip-flop circuits 4 or 9.
Patent SK-106397-A3 (SK)
Title: Fibre feeding channel of the spinning machine
Inventor: LOVAS KURT
IPC: D01H4/38
Filed: 1997-08-06
Abstract: An open-end (OE) spinning apparatus has a revolving rotor in a casing with a lid (21) opposite the rotor. The lid comprises a basic piece carrying a duct (22), for conveying individual fibres to the rotor. The duct is a component made separately from the lid and fitted into the basic piece and is a metallic tube which is pressed into shape by an internally applied pressurised medium. Also claimed is a method of making the transport duct for the feeding of fibres, sliver or threads in textile machines, e.g. for OE-spinning machines and in particular for OE-rotor spinning machines as above. The duct is pre-formed as a tube-shaped blank of ductile material, laid in an enclosing die and subjected internally to a medium so strongly pressurised that the blank expands to its finished shape.
Patent SK-108997-A3 (SK)
Title: Expression of sucrose phosphorylase in plants
Inventor: BARRY GERARD F
IPC: C12N15/29
Filed: 1996-02-08
Abstract: Introducing sucrose phosphorylase activity into plants by transformation with a gene for the enzyme increases the rate of sucrose hydrolosis, leading to increased starch, oil, and protein levels. The preferred gene is from Streptococcus mutans. Surprisingly, in potatoes transformed to express this gene in tubers, reduced bruise discoloration susceptibility and increased uniformity of starch deposition throughout the tuber are achieved.
Patent SK-169899-A3 (SK)
Title: A process for the preparation of amlodipine benzenesulphonate
Inventor: WLOSTOWSKI MAREK
IPC: C07D211/90
Filed: 1999-04-08
Abstract: A process for the preparation of amlodipine benzenesulphonat e is disclosed, wherein a salt of amlodipine with an inorganic or organic acid is reacted with alkali metal benzenesulphonate in a n aqueous medium or in a mixture water-alcohol C1-C2. Amlodipine benzenesulphonate is used for the preparation of a medicament hav ing calcium channel blocking activity, useful in the treatment of the coronary disease and arterial hypertension.
Patent SK-276089-A3 (SK)
Title: Railway crossing of building elements
Inventor: EISENREICH JAN
IPC: E01C9/04
Filed: 1989-05-05
Abstract: Crossing, which surface fits with upper level or rails is assembled of internal centric elements (1) and external centric elements (3) on which fasten on both sides in direction of rails (9) the internal edge elements and external left and right elements. Internal edge elements are ended on both sides of crossing by protecting part. Separated elements are combined of grate created created with longitudinal reinforces (14) and transversal reinforces (15), on which is located the carrying plate, to which is fastened the rubber-metal panel (18). In rail direction are elements ended with webs (11) with openings (25) for incidental connecting and center separating pin. Grate and webs (11) are located on mop boards (12). In place ending the body of roadway is located the reinforce (26) of edge in L form with chamfered corner equipped with anchoring grips and adhesive painting.
Patent SK-652010-A3 (SK)
Title: The tank with balanced body and method of manufacture thereof
Inventor: DZURENDA STEFAN
IPC: D06F37/22
Filed: 2010-06-30
Abstract: The invention relates to the tank with balance weight and manufacturing method for the same using moulding of balance weight segments during the tank production process by injection moulding of thermoplastics namely without need of using of fasteners or a separate operation in the assemblage process of the tank for example tank of drum washing machines, dryers or centrifuges, in the household appliances industry. Another solution according the invention is division of balance weight onto several equal segments and by this way is there is better elimination of tank imbalance.
Patent BE-1006964-A3 (BE)
Title: Non-dusty stabilising formulations intended for resins, method forpreparing same and use of such formulations
Inventor: BILLIET JEANNINE
IPC: C08K3/22
Filed: 1993-04-06
Granted: 1995-02-07
Abstract: Stabilising formulations for synthetic vinyl resins composed of one or moreoxides or hydroxides of one or more metals, firstly, and of one or morefatty acids, secondly in a mixture with vinyl resin grains and, ifapplicable, other stabilisers, lubricants and/or other ingredients such asfillers or pigments. The constituents are mixed dry and the reaction withformation of the fatty acid salt is carried out "in situ" during the use ofthe formulation to the vinyl resin to be stabilised.
Patent BE-1011077-A3 (BE)
Title: Composition pharmaceutique, cosmetique et/ou alimentaire aux proprietes anti-oxydantes.
Inventor: REES JEAN-FRANCOIS
IPC: A61K8/00
Filed: 1997-03-28
Granted: 1999-04-06
Abstract: La présente invention concerne une composition pharmaceutique, cosmétique et/ou alimentaire comprenant un dérivé de pyrazine de formule (voir formule ci-jointe) caractérisée en ce que les radicaux R1 à R9 sont H, des radicaux choisis parmi le groupe constitué par alkyle, alkényle, alkynyle, aryle, arylalkyle, alkylaryle, hétéroaryle, hétéroalkyle et hétéro-(alkylaryle et arylalkyle), éventuellement substitués, ou des chaînes de formule (R5 x R6)n, où n plus petit ou pégal à 1, x représente un ou plusieurs hétéro-atomes et R5 et R6 sont des radicaux choisis parmi le groupe constitué par alkyle, alkényle, alkynyle, aryle, arylalkyle, alkylaryle, hétéroaryle, hétéroalkyle et hétéro-(alkylaryle et arylalkyle), éventuellement substitués. La présente invention concerne également l'utilisation d'une telle composition pour la préparation d'un médicament destiné à la prévention et/ou au traitement des pathologies liées à l'action des agents pro-oxydants ou au traitement des tumeurs cancéreuses.
Patent WO-9934715-A3 (WO)
Inventor: VANDAMME PAUL
IPC: A47G21/14
Filed: 1999-01-05
Abstract: L'invention concerne un ensemble de coutellerie pour spaghettis. Pour manger des spaghettis, on enroule les ficelles de spaghetti autour d'une fourchette en faisant tourner cette dernière autour de son axe. Pour améliorer la prise des spaghettis, la fourchette (5) de l'invention se distingue en ce qu'elle présente au moins deux dents (8, 9) qui s'étendent sensiblement en hélice autour de son axe central. Les dents (8, 9) de la fourchette peuvent ainsi ramasser plus efficacement les ficelles de spaghetti. Nonobstant la forme hélicoïdale de ses dents (8, 9), cette fourchette (5) permet de manger confortablement étant donné qu'elle se retire de la bouche par un mouvement hélicoïdal.
Patent CZ-2002136-A3 (CZ)
Title: Titanium compounds, process of their preparation and use
Inventor: FINIDORI CLAUDINE
IPC: A61K47/32
Filed: 2000-07-11
Abstract: The invention relates to a titanium-derived compounds, and to processes for preparing the same.
Patent CZ-2004199-A3 (CZ)
Title: Crystalline form of monosodium risedronate
Inventor: RICHTER JINDRICH ING
IPC: C07F9/58
Filed: 2004-02-05
Abstract: Crystalline monosodium salt of 3-pyridyl-1-hydroxyethylidene-1,1-bisphosphonic acid, having the X-ray pattern with characteristic interplanar distances 4.35; 8.44; 13.42 and 15.73 ú.
Patent CZ-2007349-A3 (CZ)
Inventor: MATEJKA LIBOR
IPC: E06B1/26
Filed: 2007-05-17
Abstract: Osazovací rám výplne otvoru je tvoren profilem, který je vytvoren jako základní rámová deska (10), opatrená po délce svých stran na obou plochých stenách vnejšími opernými výstupky (11) a vnitrními osazovacími výstupky (12). Vnejší operné výstupky (11) jsou místne s rámovou deskou (10) spojeny vzperami (13).
Patent CZ-2012632-A3 (CZ)
Inventor: PAPEZ VACLAV
IPC: G01R15/14
Filed: 2012-09-13
Abstract: Bezkontaktní indikátor elektrického výkonu procházejícího prívodní snurou urcený pro prilození k této prívodní snure (3) nebo pro její obepnutí je tvoren indukcním snímacem sestávajícím z feromagnetického jádra (1) s malou vzduchovou mezerou priblizne odpovídající polomeru snury (3) a ze snímací cívky (2). Indukcní snímac je vlozen do stínícího krytu (4) tvoreného uzavrenou trubkou z feromagnetického materiálu, jejíz podélná osa je rovnobezná s rovinou závitu snímací cívky (2) a je spolu se stínícím krytem (4) umísten v rozebíratelném pouzdre (5) z pruzného materiálu pro upevnení a fixování k prívodní snure (3). Oba konce vinutí snímací cívky (2) jsou vyvedeny vne tohoto rozebíratelného pouzdra (5) a jsou pres filtr (7) typu úzkopásmová pásmová propust, který je naladený na kmitocet zpracovávaného signálu, spojeny se vstupem zesilovace (8) pripojeného na výstup napájecího zdroje (12). Výstup zesilovace (8) je pres usmernovac (9) spojen jednak s analogovým indikátorem (10) a jednak s dvoustavovým indikátorem (11).
Patent CZ-2018124-A3 (CZ)
Inventor: ŘÍHA ZDENĚK
IPC: B26F3/00
Filed: 2018-03-13
Abstract: Více-trysková abrazivní hlavice je určená pro čištění/odstraňování povrchů materiálů a dělení/řezání materiálů paprskem kapaliny obohaceným o pevné částice abraziva s rovnoměrným rychlostním a hustotním profilem umožňující zvýšení řezného výkonu a efektivnější využití řezného paprsku. Obsahuje směšovací komoru (22) opatřenou přívody (28) směsi (94) plynu a abraziva napojenou na abrazivní trysku (23) přičemž obsahuje alespoň jednu sadu alespoň dvou kapalinových trysek (21) uložených kolem osy (55) nástroje, přičemž každá kapalinová tryska (21) ústí do společného kanálu (27), který je napojen na směšovací komoru (22), přičemž osa (56) kapalinové trysky (21) svírá s osou (55) nástroje úhel 0,5° až 45°, přičemž kapalinové trysky (21) uloženy v sadě jsou ve stejné vzdálenosti od výstupu abrazivní trysky (23) pod stejným úhlem mezi osou kapalinové trysky (21) a osou (55) nástroje, jsou uloženy rotačně symetricky kolem osy (55) nástroje nebo proti sobě, se společným průsečíkem os (56) kapalinových trysek (21) a osy (55) nástroje ve společném kanále (27) před vstupem do směšovací komory (22) ve směru proudění.
Patent WO-0122557-A3 (WO)
Title: Dispositif antieffluves et procede de fabrication
Inventor: PARTZSCH THOMAS
IPC: H02K3/40
Filed: 2000-09-14
Abstract: L'invention concerne un dispositif antieffluves pour l'enroulement statorique de machines hautes tension rotatives avec enroulement de fils circulaires en combinaison avec une isolation de la partie d'encochage et un procédé de fabrication du dispositif antieffluves. L'invention vise à mettre en oeuvre une protection antieffluves d'extrémité et un procédé de fabrication de celle-ci pour un enroulement statorique contrôlant de manière sûre les contraintes électriques apparaissant à la sortie de l'encoche en cas d'essais avec des tension alternatives ou de choc élevées, ou en cas de fonctionnement de commutation. Le contact entre la protection de la partie d'encochage et la protection antieffluves d'extrémité doit être amélioré, et des tensions de blocage à décharge partielle plus élevées doivent être créées. Selon l'invention, le dispositif antieffluves pour l'enroulement statorique est conçu de manière que du matériau antieffluves conducteur et semi-conducteur soit disposé à l'intérieur des tôles du stator, ainsi qu'à l'extérieur des tôles du stator, le matériau antieffluves semi-conducteur étant un matériau plane coupé en lamelles disposé des deux côtés à hauteur d'encoche, et éventuellement sur la base de l'encoche, sur la garniture de l'encoche. Le point de contact entre le matériau antieffluves conducteur et le matériau antieffluves semi-conducteur se situe à l'intérieur des tôles du stator. Selon ledit procédé, les matériaux antieffluves semi-conducteurs devant être disposés sur le matériau antieffluves conducteur ne sont que partiellement collés. L'enroulement est ensuite introduit pas à pas dans les encoches au travers de l'ouverture d'encoche. L'intégration de la tête d'enroulement est ensuite effectuée, la garniture d'encoche en saillie par rapport à l'encoche étant isolée également, jusqu'au contact de la tôle de stator. A cet effet, le matériau antieffluves semi-conducteur doit être maintenu à distance de la garniture d'encoche. Selon ce procédé, le matériau antieffluves semi-conducteur est déposé sur l'isolation de la tête d'enroulement et fixé au moyen d'une bande adhésive ou d'une sangle attachées au-dessus de l'isolation de la tête d'enroulement.
Patent WO-02052147-A3 (WO)
Title: Injecteur pour un moteur a combustion interne
Inventor: LINGENER UWE
IPC: F02M61/14
Filed: 2001-12-20
Abstract: L'invention concerne un injecteur pour un moteur à combustion interne comprenant un corps d'injecteur cylindrique et un corps de buse (4) monté sur le corps d'injecteur. A cet effet, une bague d'étanchéité (28) est placée sur un segment (2) du corps de buse. Dans la zone du segment de corps de buse (2), une partie en saillie (30) pratiquement annulaire entoure par segments une surface périphérique extérieure (31) de la bague d'étanchéité (28).